What is "love" for you and what do you think of it in scientific terms?

What do you think of love in your own perspective? How much money, support, space, intimacy, etc, do you really need? Is attraction to the opposite while having a partner normal (Is it love to your partner, can you change the way of you're behavior). And in scientific terms, how do you perceive it. I heard about a study saying something about the smell of your partner is what attracts oneself to their partner. What's love to you?